California Plant Surveys?

Have any plant surveys been made in California for either geological
entities (such as the San Gabriel Mountains, for example) or for
political entities (such as Angeles National Forest).
Either hard copy or databases accessable on the Net would be useful.
Thanks.
--
Hank Brodkin "It is not necessary
Marina Del Rey, CA to understand
hankb at kaiwan.com the opening of the door
to feel the wind" (Michael Ventura)